Rainbowduino to control multiple LED Matrices?

I am planning to make a large display using the rainbowduino with multiple led matrices. I am wondering if I can control multiple led grids using the same rainbowduino or if i need to buy multiple rainbowdionos. all components arehanks from seeed studio.

As far as I can see, you need more "rainbowuinos"
Nicapizza (author)  steveastrouk4 years ago
Darn. do you know of any other way to make a large scale, led matrix that will do something, such as play out Conway's Game of Life?

HOW large ?